What I really want to do is have the token array available as a record
so that I can query against it, but not have it take up the resources of
a real table.  If I could copy from an array into a record then I can
even get rid of the loop.  Anyone have any thoughts on how to do this?

You could make a set-returning-function (about 3 lines) which RETURNs NEXT every element in the array ; then you can use this SRF just like a table and SELECT from it, join it with your other tables, etc.

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TIP 9: In versions below 8.0, the planner will ignore your desire to
      choose an index scan if your joining column's datatypes do not

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